How do I get audio input into a PSoC from a speaker? If I can, what would I have to do to the schematics of a USB headset to do this? I want to use the USB headset to bridge the speaker on a third device with a PSoC. On the chip end of the circuit, would the chip on the USB headset be pretty much replaceable with any chip that was both analog and digital compatible? I want to build the peripheral and learn how to program it later.